I have no idea where you live or why you feel this way, but you are misinformed.
The term "Assault weapons" is a misnomer, used by the media to define a catagory of weapons they wished to ban. That said, regardless of the name, you are correct that these weapons are designed for use against other people. What's your point? If a criminal or oppressive government were threatening your family, wouldn't you want the best weapon at your disposal? If not, that is certainly your choice, however, please do not try to enforce your choices on me.
As others have indicated, full auto weapons are already legal to own in this country. The assault weapons ban does not change that one way or the other. An intelligent person who wants to kill or injure a large number of people will use a bomb, not a machine gun.
I am guessing (and I may be wrong) that you have never fired either a semi-auto rifle or a full auto weapon. They are a blast (in more ways than one) to shoot! I own an M1A and have taken the time and effort to be properly trained in it's use. Much like our other attempts to be prepared (even more so) it is one of those things that I never hope I have to use (against another person), but if the situation calls for it, I will be very glad that I was prepared. Isn't that what this site is all about?
I fail to understand how my decision to protect myself and my family is any threat to any other citizen of this country or the world, unless they for some reason wish to do us harm. Nor is it any of their business.
Have a nice day, and I hope the powers that be are there to protect you when you need it.
Greg